Johnston, R. (2018). Service Operations Management: Improving Service Delivery (4th.). Pearson.
Chicago-čujuhus (17. p.)Johnston, Robert. Service Operations Management: Improving Service Delivery. 4th. Pearson, 2018.
MLA-čujuhus (9. p.)Johnston, Robert. Service Operations Management: Improving Service Delivery. 4th. Pearson, 2018.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.